This is a batch application, it will run every X seconds to process/convert audio files from sfx, 3gp, flat, etc (extensions) to mp3 and next, save them into the file system. After the audio has been processed, sends a confirmation email.
- Built on Java 8 using Spring framework.
- Uses local storage to store audios.
- Uses a relational database.
- Uses a cron expression to run every X seconds, depends on you want.
- Uses Jave-core component to process/convert audios.
- Uses the AWS API to send emails through AWS SES.
This application was created using:
- Java 8
- Maven 3
- Spring Boot
- Ubuntu 18.4
- Configure these environment variables:
| Environment variable | Example | Description |
|---|---|---|
CONTESTS_DATASOURCE_URL |
jdbc:mysql://localhost:3306/contests | The database connection |
CONTESTS_DATASOURCE_USERNAME |
root | The database user |
CONTESTS_DATASOURCE_PASSWORD |
12345 | The database password |
CONTESTS_PATH_CONVERTED_FILES |
/home/audio/converted/ | The path where CONVERTED audio files will be stored |
CONTESTS_MAIL_NOTIFICATION |
javax or AWS-SES | The service used to send emails |
CONTESTS_FILE_STORE |
file-system or AWS-S3 | The service used to store and retrieve audios |
CONTESTS_CRON |
*/60 * * * * * | Runs every 60 seconds. This is the cron by default |
AWS_ACCESS_KEY_ID |
- | The AWS credentials |
AWS_SECRET_ACCESS_KEY |
- | The AWS credentials |
- Go to
batchfolder and execute:
mvn clean install
java -jar ./target/batch-1.0.jarExamples:
| Expression | Description |
|---|---|
*/30 * * * * * |
Runs every 30 seconds |
*/60 * * * * * |
Runs every 60 seconds |
0 0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * |
Runs every 4 minutes, starting at minute 0 |
0 1,5,9,13,17,21,25,29,33,37,41,45,49,53,57 * * * * |
Runs every 4 minutes, starting at minute 1 |
0 2,6,10,14,18,22,26,30,34,38,42,46,50,54,58 * * * * |
Runs every 4 minutes, starting at minute 2 |
0 3,7,11,15,19,23,27,31,35,39,43,47,51,55,59 * * * * |
Runs every 4 minutes, starting at minute 3 |